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  <a name="ZH-CN_TOPIC_0000001792342894"></a><a name="ZH-CN_TOPIC_0000001792342894"></a>
  <h1 class="topictitle1">使用集群高可用</h1>
  <div>
   <p>配置了集群高可用特性之后，副本支持存储在成员节点对应的备份存储单元上。也可以在主节点监控备节点/成员节点的状态，比如可以在主节点监控成员节点的告警、性能、任务，也可以按成员节点生成报表。</p>
   <div class="section">
    <h4 class="sectiontitle">备份</h4>
    <p>配置了集群高可用特性之后，在对资源进行备份时，可以在SLA中指定备份副本的目标位置。</p>
    <ul>
     <li>如果选择备份存储单元，副本将存储至该存储单元。存储单元容量不足时，备份任务将会失败。</li>
     <li>如果选择备份存储单元组，系统根据存储单元组的存储策略自动选择备份目标存储单元。</li>
     <li>如果您不指定备份目标位置，则系统通过智能均衡自动选择备份目标存储单元。</li>
    </ul>
   </div>
   <div class="section">
    <h4 class="sectiontitle">复制</h4>
    <p>在对备份副本进行复制时，支持“<span>跨域</span>”和“<span>域内</span>”两种复制模式。配置了集群高可用特性之后，对于域内复制，支持选择备份存储单元组，以实现复制副本目标位置的自动切换。</p>
    <ul>
     <li>跨域复制：选择复制目标集群。副本将从本集群复制到目标集群。</li>
     <li>域内复制：选择存储单元组。对备份副本进行首次复制时，系统从复制目标端选择其中一个节点，作为复制的目标位置，后续复制时优先选择首次复制使用的备份存储单元。</li>
    </ul>
   </div>
   <div class="section">
    <h4 class="sectiontitle">监控成员节点的告警</h4>
    <p>在<span class="menucascade">“<span class="uicontrol"><span>监控</span></span> &gt; <span class="uicontrol"> <span>告警和事件</span></span> &gt; <span class="uicontrol"> <span>告警</span></span>”</span>页面选择某个节点，查看对应的告警信息。</p>
    <p><span><img src="zh-cn_image_0000001839222241.png"></span></p>
    <p></p>
   </div>
   <div class="section">
    <h4 class="sectiontitle">监控成员节点的性能</h4>
    <p>在<span class="menucascade">“<span class="uicontrol"><span>监控</span></span> &gt; <span class="uicontrol"> <span>性能</span></span>”</span>页面选择某个节点，查看对应的性能信息。</p>
    <p><span><img src="zh-cn_image_0000001839222209.png"></span></p>
    <p></p>
   </div>
   <div class="section">
    <h4 class="sectiontitle">监控成员节点的任务</h4>
    <p>在<span class="menucascade">“<span class="uicontrol"><span>监控</span></span> &gt; <span class="uicontrol"><span>任务</span></span>”</span>页面右侧的<span><img src="zh-cn_image_0000001839142321.png"></span>，勾选<span class="uicontrol">“节点”</span>，查看主节点和成员节点的任务。</p>
    <p><span><img src="zh-cn_image_0000001792502938.png"></span></p>
    <p></p>
   </div>
   <div class="section">
    <h4 class="sectiontitle">按成员节点生成报表</h4>
    <p>在<span class="menucascade">“<span class="uicontrol"><span>监控</span></span> &gt; <span class="uicontrol"><span>报表</span></span>”</span>页面创建全局报表或按成员节点创建报表。</p>
    <p><span><img src="zh-cn_image_0000001839222161.png"></span></p>
    <p></p>
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     <strong>父主题：</strong> <a href="zh-cn_topic_0000001792345234.html">集群高可用</a>
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